What’s happening?
Queensland Rail has begun major track works on the South West rail line, replacing over 100,000 ageing timber sleepers between Toowoomba, Warwick and Thallon. The works will continue until mid-2026, ensuring a safer, smoother journey for freight and heritage rail operators across the 610-kilometre route.
Why it matters
The South West rail line is a key regional freight corridor, vital for moving grain from western farms to export markets. By upgrading infrastructure, Queensland Rail is improving long-term safety and reliability for local supply chains and tourism operators that rely on the route.
By the Numbers
• More than 100,000 sleepers are being replaced between Toowoomba, Warwick and Thallon to modernise the 610-kilometre South West line.
• Around 1,000 sleepers are being replaced each day, showing steady and consistent progress on the upgrade.
• A team of 35 Queensland Rail workers is delivering the project using 12 specialised track machines.
• In FY25, over 400 grain trains travelled along the line, highlighting its ongoing importance to regional freight.
• The sleeper replacement program is scheduled for completion by mid-2026, marking a major milestone for the network.
Zoom In
Queensland Rail Head of Regional Scott Cornish said the upgrade marks an important milestone for the region. “We know how important our regional rail network is in providing a critical link for local supply chains and heritage operators,” Mr Cornish said. “These works are part of our commitment to improving existing rail infrastructure.”
Crews began replacing sleepers at Thallon earlier this year and are progressing north towards Warwick, before heading on to Toowoomba. Mr Cornish noted that the work has been scheduled around the grain season to reduce disruption.
Zoom Out
The South West line plays a key role in Queensland’s regional transport network, linking agricultural towns and freight terminals across the Darling Downs and beyond. The project forms part of Queensland Rail’s broader regional investment strategy aimed at maintaining efficient freight pathways and supporting rural economies.
Local Impact
For Toowoomba, Warwick and surrounding communities, the upgrade means continued access to reliable freight transport and preserved connections for heritage rail services. The investment also supports local employment, with crews stationed along the route throughout the two-year project.
What to look for next
Queensland Rail will continue sleeper replacement through 2025, working towards completion by mid-2026. Further upgrades to signalling and infrastructure may follow as part of Queensland Rail’s long-term regional improvement program.